P0122 Throttle position sensor circuit low input.
That is low but still the reference voltage can drop due to the EGR , and since the EGR operates at a running condition it can just set a TPS code , this reference voltage also goes to the Fuel tank pressure sensor. There been Ford model where a EVAP code would set and the owner would state the vehicle would stumble until they would just open the gas cap and reseal , and the drivabilty would be gone , the relation the 5 volt reference goes to the FTP . In most case a P0122 is the ECM.
The BN / WH is the reference voltage .
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